treemodel.h
2010-06-09 1.13.4 Various fixes
2009-11-13 Several fixes, see tex/vym.changelog for details
2009-09-09 more fixes for collision detection
2009-08-18 Fix for segfault when deleting MCO (invalid QModelIndex needs to be returned in index(TreeItem*) )
2009-05-26 Various fixes and simplifications
2009-05-20 Fixed segfault when closing a map
2009-04-20 minor fixes
2009-04-02 More moving from BranchObj to BranchItem
2009-03-23 still working on insert/remove of rows
2009-03-06 Iteration over map works now (again)
2009-02-04 started to rewrite first(), next()
2008-12-08 More fixes for selections
2008-10-29 subtrees can be deleted now
2008-10-06 Various fixes, also from 1.12. branch
2008-08-05 Preview: Added QTreeView to mainwindow (not yet functional)